/* 针对平板端 (899px - 1024px) */
@media (max-width: 1024px) {
  .qr-settings-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 12px;
  }

  .panel {
    min-height: auto;
    height: auto;
  }

  .qr-preview-container {
    min-height: 180px;
    padding: 12px;
    margin-bottom: 8px;
    background: rgba(15, 23, 42, 0.4);
  }

  #qrContainer svg,
  #qrContainer canvas {
    width: 160px;
    height: 160px;
  }

  .qr-tabs {
    width: 100%;
    justify-content: center;
    background: rgba(15, 23, 42, 0.3);
    border-radius: 12px;
    padding: 4px;
  }
  
  .qr-tab {
    flex: 1;
    text-align: center;
    padding: 8px 4px;
    font-size: 13px;
  }
  
  .structured-form {
    gap: 16px;
  }
}

/* 针对手机端 (899px 以下) 的深度适配，与 tools.css 保持一致 */
@media (max-width: 899px) {
  .app {
    padding: 12px 12px 24px !important;
    gap: 12px !important;
  }

  .header {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 8px 4px;
    height: auto;
    min-height: 0;
  }

  .header .title {
    font-size: 20px;
    margin-bottom: 0;
  }

  .header .subtitle {
    font-size: 12px;
    margin-top: 2px;
  }

  .header .controls {
    margin-top: 8px;
  }

  .header .controls button {
    height: 44px;
    font-size: 15px;
    border-radius: 12px;
  }

  .panel {
    padding: 12px !important;
    border-radius: 16px;
  }

  .panel-header {
    padding: 0 0 12px 0;
    margin-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .panel-title {
    font-size: 14px;
  }

  .qr-tabs {
    display: flex;
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    padding: 4px;
    border-radius: 10px;
    gap: 4px;
  }

  .qr-tab {
    flex: 1;
    padding: 8px 4px;
    font-size: 13px;
    text-align: center;
  }

  .panel-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: 100%;
  }

  .panel-actions button {
    padding: 8px 4px !important;
    font-size: 12px;
    height: 36px;
    border-radius: 8px;
    justify-content: center;
  }

  .qr-preview-container {
    min-height: 160px;
    padding: 20px;
    margin-bottom: 16px;
    border-radius: 0;
  }

  #qrContainer svg,
  #qrContainer canvas {
    width: 120px;
    height: 120px;
  }

  .qr-input-field {
    min-height: 120px;
    font-size: 14px;
    padding: 14px;
    border-radius: 12px;
  }

  .structured-form {
    gap: 16px;
    padding: 4px 0;
  }

  .settings-section-title {
    font-size: 14px;
    margin-bottom: 12px;
    padding-left: 8px;
  }

  .qr-settings-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 12px 10px;
  }

  .input-row label {
    font-size: 12px;
    margin-bottom: 6px;
  }

  .pill-select-trigger, .qr-select, .pill-input, .qr-color-input {
    height: 44px;
    font-size: 14px;
    padding: 0 14px;
    border-radius: 10px;
  }

  .logo-upload-container {
    display: grid;
    grid-template-columns: 1fr 44px;
    gap: 8px;
  }

  .logo-btn {
    height: 44px;
    border-radius: 10px;
  }

  .logo-btn.clear {
    width: 44px;
    padding: 0 !important;
  }

  .app-footer {
    padding: 20px 0;
    flex-direction: column;
    text-align: center;
    gap: 12px;
    align-self: center;
  }
}

/* 针对极小屏幕 (480px 以下) 的额外优化 */
@media (max-width: 480px) {
  .qr-settings-grid {
    grid-template-columns: 1fr !important;
  }

  .input-row.full-width {
    grid-column: span 1;
  }

  .panel-actions {
    grid-template-columns: 1fr 1fr;
  }

  .panel-actions button:last-child {
    grid-column: span 2;
  }
}